str1 = '111'
# print(str1)
str2 = "222"
str3 = '''333
44445
555
6666'''

print('{0}---{1}----{2}'.format(1, 2, 3))
str4 = '6666'
print(f'这个程序{str4}')

# print(f'{i}*{j}={i*j}')


sep = ','
print(sep.join(str4))

str5 = 'good good study'

print("good".center(30, '*'))

for i in str5:
    print(i, end=' ')

